Finding the union of two sets

Now that we've got a good handle on sets, it's time to start performing some set operations. Sets are unordered groups of things; something you might want to do is to combine two groups into one. This operation is called a union of two sets. An element is in the union of two sets, if it exists in either of them.

In this recipe, we'll take a look at how to create a union of two Set instances.

Getting ready

This recipe assumes that you already have a workspace that allows you to create and run ES modules in your browser. If you don't, refer to the first two chapters.

How to do it...